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QUESTION 26 Up to 20% of Americans contract influenza each year. A sample of 400 randomly selected Americans is chosen and the number with influenza is recorded. Let X represent the number with influenza in the sample. What is the probability that at most 25% of the sample are observed to have influenza? Answer to 4 decimal places. QUESTION 27 The distribution of total body protein in adult men with liver cirrhosis is approximately Normal with mean 9.8 kg and standard deviation 0.1 kg. If you take a random sample of 25 adult men with liver cirrhosis, what is the probability that their average total body protein is between 9.75 and 9.85 kg? Answer to 4 decimal places. QUESTION 28 The distribution of vitamin C amount in vitamin drops produced by a given factory is approximately Normal, with a mean of 60.0 mg and a standard deviation of 0.5 mg. If you take a random sample of 25 vitamin drops, what is the probability that the average vitamin content & is less than 59.9 mg? Answer to 4 decimal places. QUESTION 29 A study at a college in the west coast reveals that, historically, 45% of the students are minority students. If a random sample of size 75 is selected, what is the probability that more than half of the students in the sample will be minority students? QUESTION 30 According to Gallup's annual poll on personal finances, while most U.S. workers reported living comfortably now, many expected a downturn in their lifestyle when they stop working. Approximately 55% said they have enough money to live comfortably now and expected to do so in the future. If you select a sample of 200 U.S. workers, the probability is 90% that less than what sample percentage will say they expect to live comfortably? QUESTION 31 A survey found that 57% of respondents are more likely to buy stock in a U.S. corporation, or shop in one of its stores, if it is making an effort to publicly talk about how it is becoming more sustainable. Suppose you select a sample of 100. What is the probability that in the sample, between 52% and 62% are more likely to buy stock in a U.S. corporation, or shop in one of its stores, if it is making an effort to publicly talk about how it is becoming more sustainable